<template>
	<view>
        <view class="search-box">
            <my-search @myclick="msgchange"></my-search>
        </view>
	<view class="scroll-view-container">
    <scroll-view scroll-y="true" :style="{height:wh+'px'}" class="left">
    <block v-for="(item,i) in cateList" :key="i">
 <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="clickchange(i)">{{item.cat_name}}</view>
    </block>
    </scroll-view>
    <scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
      <view class="cate-lv2" v-for="(item2, i2) in catelevel" :key="i2">
        <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
       <view class="cate-lv3-list">
            <!-- 三级分类 Item 项 -->
            <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3"  @click="gotoGoodsList(item3)">
              <!-- 图片 -->
              <image :src="item3.cat_icon"></image>
              <!-- 文本 -->
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
      </view>
    </scroll-view>
  </view>
	</view>
</template>

<script>
  import badgeMix from '@/mixin/tabbar-badge.js'

	export default {
    mixins: [badgeMix],
		data() {
			return {
				wh:0,
        cateList:[],
        active:0,
        catelevel:[],
         scrollTop: 0
        
			};
        
		},
    onLoad(){
      const  sysinfo=uni.getSystemInfoSync()
        console.log(sysinfo);
        this.wh=sysinfo.windowHeight
        this.getcateList()
        },
        methods:{
          async getcateList(){
            const {data:res}=await uni.$http.get('/api/public/v1/categories')
            if(res.meta.status!==200) return uni.$showMsg()
            this.cateList=res.message
            this.catelevel=res.message[0].children
          },
          clickchange(i){
            this.active=i
            this.catelevel=this.cateList[i].children
  this.scrollTop = this.scrollTop === 0 ? 1 : 0

          },
          gotoGoodsList(item3) {
            uni.navigateTo({
              url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
            })
          },
          msgchange(){
            uni.navigateTo({
                url: '/subpkg/search/search'
            })
          }
        }
        
	}

</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
}
  
.left{
  width: 120px;
}
 .left-scroll-view-item {
      line-height: 60px;
      background-color: #f7f7f7;
      text-align: center;
      font-size: 12px;

      // 激活项的样式
      &.active {
        background-color: #ffffff;
        position: relative;

        // 渲染激活项左侧的红色指示边线
        &::before {
          content: ' ';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
 .cate-lv3-list {
   display: flex;
   flex-wrap: wrap;
 
   .cate-lv3-item {
     width: 33.33%;
     margin-bottom: 10px;
     display: flex;
     flex-direction: column;
     align-items: center;
 
     image {
       width: 60px;
       height: 60px;
     }
 
     text {
       font-size: 12px;
     }
   }
 }
 .cate-lv2-title{
     font-size:12px;
     font-weight: bold;
     text-align: center;
     padding: 15,0;
 }
 .search-box {
   // 设置定位效果为“吸顶”
   position: sticky;
   // 吸顶的“位置”
   top: 0;
   // 提高层级，防止被轮播图覆盖
   z-index: 999;
 }

</style>
